Anvil-block lug chuck



Jan. 27. 1925. 1,524,301.

v. HAIGHT ANVIL BLOCK LUG CHUCK Filed July 14, 1921 INVENTOR Harryl'lidz'yhf ATT RNEY Patented ,lan, er, lFZF,

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HARRY VERGOE HAIGJELT, F SHERBROOK JERSEY.

E, QUEBEC, CANADA, ASSIGNOR T0 INGER- SOLL-F/AND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW anvrn-nnocn nus canon.

Application filed July 14:, 1921. Serial No. 484,707.

To all whom it 'may concern Be it known that l, HARRY V. HAIGHT, a citizen of the Dominion of Canada, a resident of Sherbrooke, Province of Quebec, Canada, have invented a certain Anvil-Block Lug Chuck, of which the following is a specification accompanied by drawings.

This invention relates to fluid actuated rock drills of the hammer type, but more particularly to an anvil-block lug chuck for drills of that type.

In those cases in which the hammer piston strikes directly upon the end of the shank of the drill steel, trouble is sometimes experienced because ofthe chipping of the-striking face of the piston. This trouble may in some cases be due to poor piston shanks, but protection for the piston has been afforded by permitting the piston to strike upon an anvil block instead of directly upon the shank of the steel.

The objects of the present invention are to enable an anvil block to be interposed be tween the piston and the shank of lug steel, that is, a steel having lugs on the shank, and for this purpose l have devised an anvil block lug chuck which may be readily assembled and disassembled for the insertion and removal of the anvil block, is strong and rugged in'construction and has parts which are not liable to become broken or distorted in use.

Further objects of the invention will hereinafter appear and to all of these ends the invention consists of the anvil block lug chuck illustrated in some of its preferred forms in the accompanying drawings, in which- Figure 1 is a side view partly in longitudinal section of a rock drill having my luggchuck applied thereto, j I

Figure 2 is a transverse sectional view of Figure 1 0n the line 22 looking in the direction of the arrows and also on the line 2-2 of Figure 3-,

. Figure 3, is a view similar to Figure 1 of a modification,

Figure 4, is a transverse sectional view of Figure 3 on the line 4-4 looking in the direction of the arrows,

Figure 5, is a longitudinal sectional view partly broken away of a modified form of the anvil-block lug chuck, and

Figure 6, is a transverse sectional view on the line 6 -6 of Figure 5.

Referring to the drawings, the cylinderA of'the rock drill, the front head B and the handle C which in this instance also forms the back head, are held together by the usual side bolts 1!). A hammer piston, of which only the forward reduced and fluted shank E is shown, reciprocates in the cylinder A, and imparts blows of'impact to the drill steel F, the shank of which extends into the front head. A valve casin G adapted to contain a suitable distributing valve is secured tothe cylinder A as by means of the bolts H,.and motive fluid is supplied at the inlet J and exhausted at the exhaust port K.

In accordance with my invention, I have devised a form of chuck particularly adaptable for receiving an anvil block L interposed between the hammer piston ]E and the lug steel F, for protecting the piston, the usual lugs on the steel being indicated at 0. Suitable provision is made for readily and conveniently assembling and disassembling the parts so that the steel may be inserted and withdrawn as required in the usual construction and so that the anvil block-may also be quickly inserted or changed.

Referring at first more particularly to Figure 1, a chuck key P is located within the forward end of the front head B against the flange Q and formed with an opening K elongated in a plane at right angles to the plane of the section of Figure 1 for permitting the shank of the steel and the lugs O to be inserted through the key, and turned so that the lugs may bear against the shoulders S formed within the forward cavity or jaw T in the jaw half of the rotating chuck, or jaw member U removably secured to the remaining portion of the chuck formed by the rotatin chuck member or nut half V. The chuck ey P is formed with lugs or projections W enga ing a transverse recess X in the end face 0 the chuck jaw U for maintaining the key and chuck jaw in proper alignment as they rotate together.

The jaw half or chuck jaw U is preferably in the form of a pierced forging for strength and lightness, and in Figure 1 the nut half V and jaw half U are threaded together by means of the internal screw threads Y on member V cooperating with the external screw threads Z on the reduced portion a of the member lU. When the parts are adjusted and tightened in position the member V has a bearing against the shoulder b on the chuck jaw U.

The nut half V of the chuck is in the form of a sleeve having a. bore 0 in which the anvll block L is located and when the chuck members U and V are unscrewed, the anvil block may be readily and conveniently inserted in or removed from the chuck member V. Rearward movement of the anvil block is limited by the integral shoulder d formedat the rearward end of the bore 0 and this shoulder forms asolid abutment which is not liable to break or become deformed with use. By removing the front head B with the chuck parts, the anvil block L may be readily removed from the chuck after the chuck member V is removed from the front head 13, without first removing the chuck jaw U and chuck key P from the front head.

' Any suitable means may be provided for imparting rotation to the chuck as for insgance, riflebar rotation, but I have only s own that portion of the rotation comprlsing the slidable but non-rotatable connection between the forward fluted shank E of the hammer piston and the nut half V of the chuck to indicate that rotation is imparted to the chuck. An internally fluted chuck nut e is threaded into the reaward end of the nut half V of the chuck for engaging the external flutes on the piston shank and a front cylinder washer f surrounds the parts as indicated.

With the construction shown in Figure 1 the chuck members may be unscrewed and separated when the front head is removed,

but in view of the fact that difiiculty may sometimes be experienced in jamming of the threads between the two chuck members, the modifications of the construction shown in Figures 3 to 6 inclusive may be preferred.

In the modification shown in Figure 3 the jaw half 9 of the chuck is formed of a pierced forging, as in Figure l but is somewhat differently constructed at its rearward end, in order that this jaw half may be clutched to the nut half h of the chuck instead of being screw threaded thereto as in Figure 1. The jaw half g is provided with a rear recess j for receiving the anvil block I1 and is also provided with clutch jaws 7c cooperating with clutch members 79 on the nut half h of the chuck. An internal shoulder 0 is formed on the nut half It for limiting the reaward movement of the anvil block. In other respects, the construction of the anvil block lug chuck is like that indicated in Figure 1, but the chuck members may be more readily assembled and disassembled because of the simple sliding clutch engage ment between said members.

In the modification shown in Figure 5, internal flutes q are provided at the forward end of the nut half 2 of the chuck, adapted to engage external flutes s on the jaw half non-rotatably engaging the rearward w of the chuck so that these parts have nonrotatable engagement but may be readily assembled and disassembled.

I claim:

1. A rotatable anvil block lug chuck for rock drills of the hammer type, adapted to impart rotation to the lug steel, comprising a front head, two chuck members therein removably but nonrotatably engaging each other at their meeting portions, one member having a jaw at its forward end for receiving the shank and lugs of the lug steel, the other member having an integral shoulder at the rearward end of the bore of said member forming an abutment, a removable anvil block located within the chuck member having the said shoulder for receiving and imparting the blows of impact to the drill steel, and a chuck key in the front head connected to one of said chuck members to rotate therewith, said anvil block bein adapted to be removed from the chuck mem er in which it is located after the front head is removed from the machine without removing said chuck key and jaw member from the front head.

2. A rotatable anvil block lug chuck for rock drills of the hammer type, adapted to im art rotation to the lug steel, comprising a ront head, a jaw member having a jaw adapted to receive the shank and lugs of the lug steel, a chuck member having an integral shoulder at the rearward end of the bore of said member forming an abutment, said chuck member removably and non-rotatably engaging said jaw member, a removable anvil block located within said chuck member having the shoulder and adapted to receive and transmit the impact blows of the hammer piston to the drill steel, and a chuck key in the front head connected to said jaw member to rotate therewith, said anvil block bein adapted to be removed from the chuck 'mem er in which it is located after the front head is removed from the machine without removing said chuck key and jaw member from the front head.

3; A rotatable anvil block lug chuck for rock drills of the hammer type, adapted to impart rotation to the lug steel, comprising a front head, a chuck key in the front head through which'the shank of the drill steel extends, a jaw member removably and non rotatably engaging said chuck key and ha ving a jaw adapted to receive the shank and lugs of the lug steel, a chuck member having an integral shoulder at the rearward end of 1 the bore of said member forming an abutment, said chuck member removablv and portion of said jaw member, a removable anvil block located within said chuck member having the shoulder and adapted to receive and transmit the impact blows of the hammer piston to the drill steel, said anvil block being adapted to be removed from the chuck member in which it is located after the front head is removed from the machine without removing the chuck key and jaw member from the front head.

4. A rotatable anvil block lug chuck for rock drills of the hammer type, adapted to impart rotation to the lug steel, comprising a front head. a jaw member having a jaw adapted to receive the shank and lugs of the lug steel, :1 chuck member having an integral shoulder at the rearward end of the bore of said member forming an abutment for limiting the rearward movement of an anvil block. said chuck member removably and non-rotatably engaging said jaw member, a removable anvil block located within said chuck member having the shoulder and adapted to receive and transmit the impact blows of the hammer piston to the drill steel, and a chuck key in the front head connected to said jaw member to rotate therewith, said anvil block being adapted to be removed from the chuck member in which it is located after the front head is. removed from the machine without removing said chuck key and jaw member from the front head.

In testimony whereof I have signed this specification.

I HARRY VERCOE HAIGHT. 

